package com.sistema.util;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.hibernate.SessionFactory;

public class ConexaoHibernateFilter implements Filter {

	private SessionFactory sf;
	
	
	@Override
	public void destroy() {}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		
		try {
			this.sf.getCurrentSession().beginTransaction();
			chain.doFilter(request, response);
			this.sf.getCurrentSession().getTransaction().commit();
			this.sf.getCurrentSession().close();
		} catch (Exception ex) {
			try {
		  if(this.sf.getCurrentSession().getTransaction().isActive()){
			  this.sf.getCurrentSession().beginTransaction().rollback();
		  }
			} catch (Exception t) {
				t.printStackTrace();
			}
			throw new ServletException();
		}
			
	}

	@Override
	public void init(FilterConfig config) throws ServletException {
		this.sf = HibernateUtil.getSession();		
	}

}
